Method and apparatus for recording and reproducing color images on monochrome film

ABSTRACT

A method of recording color images on monochrome recording medium, wherein successive frames are recorded on successive areas along the length of the recording medium, and wherein, considering each such area as being composed of two parts of unequal width, luminance signals are recorded on the larger said parts of such areas, and a corresponding pair of color signal components are recorded on the smaller said parts of such areas. The invention includes apparatus for recording and reproducing images according to this method.

As indicated in FIGS. 1546, a further air-insulated and twisted cable 80usable in the transmission line 2 of the instant invention generallycomprises a first multistranded conductor 82 and a second multistrandedconductor 84 of somewhat smaller cross section or diameter thanconductor 82. During the overall formation of conductor cable 80,conductor 84 is helically and tightly wound about conductor 82 whilebeing rotated about the axis 83 of conductor 82.

Conductor 84 is made up preferably of a central core strand 86 of highstrength steel or aluminum and an outer multistrand cover layer 88preferably of six individual strands of suitable electrically conductivealuminum or aluminum alloy materials helically and tightly woundtogether about core strand 86. Conductor 82 is preferably comprised of asingle core strand 90 of suitable high strength aluminum or steelmaterials and inner and outer multistrand cover layers made up ofindividual strands 92 and 94 respectively of suitable electricallyconductive aluminum or aluminum alloys. The individual strands 92 and 94of inner and outer cover layers of conductor 82 are wound together inthe same or reverse direction relative to each other about core strand90. Inner cover layer is preferably provided with six individual strands92 and outer cover layer is preferably provided with twelve individualstrands 94. By virtue of conductors 82 and 84 being of differentdiameters the centroid of any longitudinal section of cable 80 is offsetfrom axis 83 of conductor 82 in a direction toward axis 85 of thesmaller conductor 84 along the geometrical major axis M of cable 80.

As in the case of cable 10" of FIG. 12, the outer periphery ofconductors 82 and 84 may be substantially covered by an outermultistrand cover layer 96 shown in dotted lines in FIG. 16 and made upofa suitable electrically conductive grade of aluminum or an aluminumalloy. if desired, suitable filler strands may be interposed in theinterstices formed between adjacent strands 88 and 94 of the outer coverlayers of condoctors 84 and 82.

As indicated in H0. 16, the major axis M of a transverse section ofcable 80 has been rotated to a position relative to a vertical plane 98as well as relative to the general direction of wind flow 9 and thetransverse sections of cable 80 are somewhat elliptical or oval shaped.Consequently, cable 80 when used in a transmission line 2 effectivelyresists wind induced vibrations in a similar manner as set forth in theaforedescribed cable embodiments of FIGS. 2-7, 8-1 1, 12 and 13-14. g

The various cables of FIGS. 2-16 of the instant invention even thoughbeing generally of elliptical shape in cross-sectional configuration arestructured for ready manufacture by conventional stranding equipment ina suitable fashion. The fact that they are made up of two or moremultistranded conductors with or without an outer multistrand coverlayer would usually depend upon the electrical capacity requirements ofa given conductor and its conditions of installations. Advantageousembodiments of the invention have been shown and described. It will beobvious to those skilled in the art that various changes andmodifications can be made therein without departing from the appendedclaims, wherein:

What is claimed is:

1. A high voltage vibration and sag-resistant electric powertransmission line comprised of a plurality of air insulated cablessuspended between towers and spaced a predetermined distance apart, eachof said cables having a uniform cross section and a continuously varyingprofile along its length and each of said cables being made up of aplurality of multistranded conductors, at least one of the conductorsbeing continuously and progressively helically and tightly wound aboutanother conductor so as to provide the final cable with a transversecross section that approximates an elliptically shaped air foil, themajor axis of said air foil intersecting while at the same time beingprogressively rotated about the common central longitudinal axis of thecable for the entire length of the cable so as to define an airinsulated cable which in its installed condition in said transmissionline has a constantly and uniformly varying profile thickness along itsentire length as projected on a vertical plane passing through andcoextensive with the said common central longitudinal axis and theextent of the major axis of the cable being on the order of between oneand one-half and two and one-half times the extent of the minor axisthereof.

2. A transmission line as set forth in claim 1 wherein the degree ofhelical twist of a cable along its common central axial length amountsto between 2 to 14 per inch of such axial length.

3. A transmission line as set forth in claim 1 wherein the air insulatedcables are spaced apart a distance on the order of from 5 to 30 feet.

4. A transmission line as set forth in claim ll, wherein one of thecables has an elongation characteristic on the order of 0.0008 to 0.0012in./in. per 1,000 p.s.i. tensile load thereon.

5. A transmission line as set forth in claim 1 wherein the multistrandedconductors of at least one of the cables are sheathed in at least oneouter layer of electrically conductive strands that are helically andtightly wound about the multistranded conductors.

6. A transmission line as set forth in claim 5 including a filler strandinterposed between said multistranded conductors and the outer layer ofconductive strands.

7. A transmission line as set forth in claim 1 wherein each cable ismade up of a pair of multistranded conductors helically wound about eachother with each of said conductors being made up of a core strand andouter conductor strands helically wound about the core strand.

8. A transmission line as set forth in claim 7 wherein the degree oftwist of each cable in a line along the cables common central axiallength amounts to between 2 to 14 per inch of such axial length.

9. A transmission line as set forth in claim 1 wherein one of the cablesis comprised of a central multistranded conductor and a pair of outermultistranded conductors helically and tightly wrapped about the centralconductor.

10. A transmission line as set forth in claim 1 in which thelongitudinal centroid of one of the cables is offset relative to themidpoint of the major geometrical axis of the final elliptically shapedcable.

11. A high voltage vibration and sag resistant primarily air insulatedpower cable, said cable having a uniform cross section and acontinuously varying profile along its length, said cable being made upof a plurality of multistranded conductors, at least one of theconductors being continuously and progressively helically and tightlywound about another conductor so as to provide the final and completelyfinished cable with a transverse cross section that fully approximatesan elliptically shaped air foil, the major axis of said air foilintersecting while at the same time being progressively rotated aboutthe common central longitudinal axis of the cable for the entire lengthof the cable so as to define an air insulated cable which uponinstallation in a power line maintains a constantly and uniformlyvarying profile thickness along its entire length as projected on avertical plane passing through and coextensive with the said commoncentral longitudinal axis and the extent of the major axis of the cableat any given cross section along the entire length of the cable being onthe order of between one and one-half and two and one-half times theextent of the minor axis thereof.

12. A power cable as set forth in claim 11 wherein the degree of helicaltwist of the cable along its common central axial length amounts tobetween 2 to 14 per inch of such axial length.

13. A power cable as set forth in claim 11 wherein said plurality ofmultistranded conductors comprises a pair of similarly strandedconductors.

14. A power cable as set forth in claim 11, wherein the cable has anelongation characteristic on the order of 0.0008 to 0.0012 in./in. per1,000 p.s.i. tensile load thereon.

15. A power cable as set forth in claim 11 wherein the multistrandedconductors of the cables are sheathed in at least one outer layer ofelectrically conductive strands that are helically and tightly woundabout the multistranded conductors.

United States Patent Rogers 51 Apr. 25, 1972 METHOD AND APPARATUS FORRECORDING AND REPRODUCING COLOR IMAGES ON MONOCHROME FILM inventor:Bernhard .1. Rogers, London, England The Rank Organisation Limited,London, England Feb. 26, 1970 Assignee:

Filed:

Appl. No.:

Foreign Application Priority Data Feb. 28, 1969 Great Britain..10,868/69 US. Cl. ..l78/5.4 CD, l78/6.7 A

Int. Cl. ..H04n 1/22 Field of Search ..178/6.7 A, 5.2, 5.2 D, 5.4,

l78/5.4 CR

[56] References Cited UNITED STATES PATENTS 2,983,784 5/1961 Razdow..l78/5.4 CR 2,612,553 9/1952 Homrighous... ....l78/5.2 D 2,769,02810/1956 Webb ....l78/6.7 A 3,475,549 10/1969 Goldmark et al. 178/67 APrimary Examiner-Robert L. Richardson Assistant Examiner-Richard P.Lange AttorneyHolcombe, Wetherill & Brisebois 5 7] ABSTRACT A method ofrecording color images on monochrome recording medium, whereinsuccessive frames are recorded on successive areas along the length ofthe recording medium, and wherein, considering each such area as beingcomposed of two parts of unequal width, luminance signals are recordedon the larger said parts of such areas, and a corresponding pair ofcolor signal components are recorded on the smaller said parts of suchareas. The invention includes apparatus for recording and reproducingimages according to this method.

5 Claims, 5 Drawing Figures

2. A method according to claim 1, wherein the color signal componentsare color difference signals.
 3. A method of reproducing color imagesfrom monochrome recording medium on which each of successive frame areasalong the length of the medium is recorded with a luminance image in thewider of two different width parts of that area and with a different oneof a pair of color signal components in each of longitudinallysuccessive halves of the narrower of said two parts, which methodincludes the steps of: a. line scanning each frame area transversely ofthe film by directing each scan crossing said wider part of each framearea across only one of said halves of said narrower part, with the oddand even numbered scans crossing said wider part crossing differenthalves of the narrower part; b. sensing the results of said scanning toproduce separate signals corresponding to the luminance image recordingand each color signal recording; and c. processing said separate signalsto provide chrominance signals representative of red, green and blueimage components.
 4. Apparatus for reproducing color images frommonochrome recording medium on which the color image is recorded, ineach frame area, as a luminance image on a wider part of that area andas color signal components on longitudinally successive halves of anarrower part positioned laterally of said wider part in the same framearea, said apparatus comprising a flying spot scanner for scanning eachframe area transversely of the recording medium with scans that aresuccessive on said wider part; means for controlling jumping of thescanbeam for the narrower part to cause alternate lines of scan to besuccessive on one half of the narrower part and the remaining lines ofscan to be successive on the other half of the narrower part; two lightsensing arrangements, each responsive to signals from a different one ofsaid parts of the frame areas; and means for processing the outputs ofthe light sensing arrangements to provide signals representative of red,green and blue image components.
 5. Apparatus according to claim 4,wherein said means for processing comprises means for storing for theduration of one line scan signals from the one of the light sensingarrangements corresponding to the smaller part of said areas, and gatingmeans for the output of said one light sensing arrangement and the meansfor storing, the gating means being switchable at line scan rate toprovide each color signal component on a different corresponding one oftwo outputs.